add file upload and down servlets
	deleted:    conf/config
	modified:   src/main/java/com/netease/blackqa/utils/CommonString.java
	modified:   src/main/java/com/netease/blackqa/utils/Main.java
	modified:   src/main/webapp/WEB-INF/web.xml
	modified:   target/classes/com/netease/blackqa/utils/CommonString.class
	modified:   target/classes/com/netease/blackqa/utils/Main.class
git add	resources/
git add	src/main/java/com/netease/blackqa/servlets/FileServlet.java
git add	src/main/resources/